From: Matthias Kretz <kr...@kde.org>
Signed-off-by: Matthias Kretz <m.kr...@gsi.de>
libstdc++-v3/ChangeLog:
* include/experimental/bits/simd.h (__execute_on_index_sequence,
__execute_on_index_sequence_with_return,
__call_with_n_evaluations, __call_with_subscripts): Add flatten
attribute.
---
libstdc++-v3/include/experimental/bits/simd.h | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--
──────────────────────────────────────────────────────────────────────────
Dr. Matthias Kretz https://mattkretz.github.io
GSI Helmholtz Centre for Heavy Ion Research https://gsi.de
std::experimental::simd https://github.com/VcDevel/std-simd
──────────────────────────────────────────────────────────────────────────
diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index 5d243f22434..21100c1087d 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -234,7 +234,8 @@ namespace __detail
// unrolled/pack execution helpers
// __execute_n_times{{{
template <typename _Fp, size_t... _I>
- _GLIBCXX_SIMD_INTRINSIC constexpr void
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ void
__execute_on_index_sequence(_Fp&& __f, index_sequence<_I...>)
{ ((void)__f(_SizeConstant<_I>()), ...); }
@@ -254,7 +255,8 @@ template <size_t _Np, typename _Fp>
// }}}
// __generate_from_n_evaluations{{{
template <typename _R, typename _Fp, size_t... _I>
- _GLIBCXX_SIMD_INTRINSIC constexpr _R
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ _R
__execute_on_index_sequence_with_return(_Fp&& __f, index_sequence<_I...>)
{ return _R{__f(_SizeConstant<_I>())...}; }
@@ -269,7 +271,8 @@ template <size_t _Np, typename _R, typename _Fp>
// }}}
// __call_with_n_evaluations{{{
template <size_t... _I, typename _F0, typename _FArgs>
- _GLIBCXX_SIMD_INTRINSIC constexpr auto
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ auto
__call_with_n_evaluations(index_sequence<_I...>, _F0&& __f0, _FArgs&& __fargs)
{ return __f0(__fargs(_SizeConstant<_I>())...); }
@@ -285,7 +288,8 @@ template <size_t _Np, typename _F0, typename _FArgs>
// }}}
// __call_with_subscripts{{{
template <size_t _First = 0, size_t... _It, typename _Tp, typename _Fp>
- _GLIBCXX_SIMD_INTRINSIC constexpr auto
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ auto
__call_with_subscripts(_Tp&& __x, index_sequence<_It...>, _Fp&& __fun)
{ return __fun(__x[_First + _It]...); }